Delta, this is what has worked for me in terms of nutrition
EATING FOR A CENTURY RIDE
2 DAYS BEFORE
LOAD UP ON CARBS: MEALS INCLUDING PASTAS, WHOLE GRAIN CEREALS, OAT BRAN, COUSCOUS, BROWN RICE, WHOLE GRAIN BREAD, BEANS BANANAS, SWEET POTATOES.
NIGHT BEFORE
EAT AN EASILY DIGESTED PASTA MEAL THAT YOU‘VE HAD A MILLION TIMES. DON’T EXPERIMENT WITH NEW STUFF OR SPICY FOOD. FINISH BY 9.00PM.
MORNING OF THE RIDE
TWO HOURS BEFORE THE START, EAT A BOWL OF OATMEAL WITH A BANANA AND SOME ORANGE JUICE.
REST STOP
#1 , 20 MILES
HALF AN ENERGY BAR AND SPORTS DRINK. KEEP SPARE BARS WITH YOU.
REST STOP
#2 , LUNCH, 45 MILES
PEANUT BUTTER AND JELLY SANDWICH WITH CHIPS, FIG BARS AND JUICE, TO REPLENISH GLYCOGEN. ALSO GOOD ARE TURKEY SUB, HUMMUS WRAPS AND BAGEL SANDWICHES.
REST STOP
#3 , 65 MILES
NO-MAN’S LAND! PSYCHOLOGICAL TIREDNESS! EAT CHOCOLATE. A MILKY WAY IS GOOD. FREEZE IT THE NIGHT BEFORE.
REST STOP # 4, 85 MILES
HYDRATION IS YOUR PRIORITY. PACK SOME OF YOUR FAVORITE ENERGY DRINK POWDER IN A ZIPLOC BAG AND MIX IT AT THIS STOP. THIS WILL REPLENISH YOU FOR THE FINAL MILES.
FINISH, 100 MILES
STRETCH OUT. WITHIN 20 MINUTES OF FINISHING, EAT CHICKEN WITH LINGUINI TO RESTOCK YOUR GLYCOGEN STORES WHILE YOUR MUSCLES ARE AT THEIR HUNGRIEST.
Good luck - it'll be a breeze, but at 80 or so miles you might wonder why you are doing this to yourself!
p.s. didn't mean to SHOUT, but I cut and pasted from something I've had for along time